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    <meta charset="UTF-8">
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    <title>Document</title>
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<body>
    <script>
        //创建后立马执行  执行结果 1 3 2  却 then不执行就不会执行resolve 或reject
        let p = new Promise((resolve, reject) => {
            console.log('1')
            resolve('成功')
            console.log('3')
        })
        console.log('2')
    </script>

</body>

</html>